This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs Solfeggio in G Major Wq. 112-18 (H. 149) is one of the most renowned pieces among his keyboard works. This piece, though brief, is characterized by its highly lively melody and rhythm, demanding advanced technical skills from the performer. The combination of rapid passages and brilliant ornamentation leaves a strong impression on the audience. Throughout the piece, Emanuel Bachʼs original expressiveness is palpable, highlighting the diversity of emotions in his music. Notably, the piece has a strong improvisational element, allowing for varied expressions depending on the performerʼs interpretation. This work demonstrates new musical possibilities beyond the boundaries of classical music.